快速压缩机试验系统及N2O-C2H4着火特性测量

Experimental system for rapid compression machine and measurement of N_(2)O-C_(2)H_(4) ignition characteristics

文中设计并搭建了适用于测量较宽温度、压力范围下着火延迟时间的快速压缩机试验系统。详细介绍了快速压缩机试验系统的主要子系统的构成及其功能,以及试验操作步骤。通过与文献试验数据对比,验证了文中试验系统的准确性,并通过相同工况多次测量,验证了文中试验系统的可靠性。基于此,测量了不同温度、压力工况下N2O-C2H4的着火特性。结果表明:N2O-C2H4着火延迟时间对初始温度表现较为敏感,在1 110~1 170 K的范围内随着初温的升高,着火延迟时间从142 ms缩短至8.7 ms。着火延迟时间随着压力的升高呈现快速下降趋势。

In this article,efforts are made to design and build an experimental system which is used to measure the rapid compression machine’s ignition-delay time with a wide temperature-and-pressure range.Besides,the composition and functions of the experimental system’s main subsystems,as well as their experimental operation steps are introduced in detailed.It is verified that the experimental system is accurate by comparing with the experimental data in literature.In addition,by means of multiple measurements under the same working conditions,it is verified that the experimental system is reliable.Based on this,the N_(2)O-C_(2)H_(4) ignition characteristics under different temperature and pressure conditions are measured.The results show that the N_(2)O-C_(2)H_(4) ignition-delay time is more sensitive to the initial temperature performance.Within the range of 1110-1170 K,as the initial temperature increases,the ignition-delay time is shortened from 142 ms to 8.7 ms,and it shows a rapid downward trend with the ever-growing pressure.